TQ2SS-4.5V-W Telecom Relay Equivalent & Substitute Parts

Part Overview

The TQ2SS-4.5V-W is a Surface Mount Telecom Relay manufactured by Panasonic Electric Works, classified as a DPDT (Double Pole Double Throw) configuration with 2 Form C contacts. This non-latching relay operates at 4.5VDC coil voltage and supports switching loads up to 2A at 125VAC or 220VDC maximum. The part is currently Active in product status with 710 pieces available in new original inventory.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific application needs while maintaining identical electrical and mechanical performance characteristics.

Key Parameters

Parameter	Value
Manufacturer Part Number	TQ2SS-4.5V-W
Manufacturer	Panasonic Electric Works
Relay Type	Telecom
Mounting Type	Surface Mount
Coil Voltage	4.5VDC
Contact Form	DPDT (2 Form C)
Contact Rating (Current)	2 A
Switching Voltage	125VAC, 220VDC - Max
Coil Current	31 mA
Coil Type	Non Latching
Termination Style	Gull Wing
Must Operate Voltage	3.38 VDC
Must Release Voltage	0.45 VDC
Operate Time	4 ms
Release Time	4 ms
Operating Temperature Range	-40°C ~ 85°C
Contact Material	Silver Nickel (AgNi), Gold (Au)
Coil Resistance	145 Ohms
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TQ2SS-4.5V-W are identified based on strict electrical and mechanical parameter matching. The substitution criteria are defined by the following key parameters that must remain identical:

Coil Voltage: 4.5VDC (exact match required)
Contact Form: DPDT (2 Form C) configuration
Contact Rating: 2A maximum switching current
Switching Voltage Capability: 125VAC, 220VDC maximum
Coil Current: 31 mA
Coil Type: Non Latching
Mounting Type: Surface Mount
Termination Style: Gull Wing
Operating Temperature Range: -40°C ~ 85°C
Contact Material: Silver Nickel (AgNi), Gold (Au)
Coil Resistance: 145 Ohms
Operate/Release Time: 4 ms each
Must Operate/Release Voltage: 3.38 VDC / 0.45 VDC

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. Series designation differences (TQ versus TQ-SMD) do not affect substitution eligibility when all electrical and mechanical parameters are identical.

Parameter Comparison

Parameter	TQ2SS-4.5V-W (Main Part)	TQ2SL-4.5V (Substitute)	Match Status
Manufacturer	Panasonic Electric Works	Panasonic Electric Works	Identical
Relay Type	Telecom	Telecom	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Coil Voltage	4.5VDC	4.5VDC	Identical
Contact Form	DPDT (2 Form C)	DPDT (2 Form C)	Identical
Contact Rating (Current)	2 A	2 A	Identical
Switching Voltage	125VAC, 220VDC - Max	125VAC, 220VDC - Max	Identical
Coil Current	31 mA	31 mA	Identical
Coil Type	Non Latching	Non Latching	Identical
Termination Style	Gull Wing	Gull Wing	Identical
Must Operate Voltage	3.38 VDC	3.38 VDC	Identical
Must Release Voltage	0.45 VDC	0.45 VDC	Identical
Operate Time	4 ms	4 ms	Identical
Release Time	4 ms	4 ms	Identical
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Contact Material	Silver Nickel (AgNi), Gold (Au)	Silver Nickel (AgNi), Gold (Au)	Identical
Coil Resistance	145 Ohms	145 Ohms	Identical
Product Status	Active	Active	Identical

Engineering Selection Recommendations

The TQ2SL-4.5V is a direct parametric equivalent to the TQ2SS-4.5V-W. Both parts are manufactured by Panasonic Electric Works and maintain Active product status, ensuring continued availability and support.

Selection between these parts is based on inventory availability and supply chain requirements rather than technical performance differences. The TQ2SL-4.5V currently maintains higher inventory levels (1,828 pieces) compared to the TQ2SS-4.5V-W (710 pieces), making it suitable for applications requiring extended lead time assurance.

The TQ2SL-4.5V carries ROHS3 compliance and REACH Unaffected status, with ECCN classification EAR99 and HTSUS code 8536.41.0020. These certifications align with the regulatory requirements applicable to telecom relay components in industrial and telecommunications applications.

Frequently Asked Questions (FAQ)

Q: Can TQ2SL-4.5V be used as a direct replacement for TQ2SS-4.5V-W in existing designs?

A: Yes. All electrical parameters, mechanical specifications, and performance characteristics are identical. No circuit modifications or PCB layout changes are required for substitution.

Q: What is the difference between the TQ series and TQ-SMD series designations?

A: Series designation reflects internal Panasonic product categorization. Both TQ2SS-4.5V-W and TQ2SL-4.5V maintain identical electrical and mechanical specifications for telecom relay applications.

Q: Are there any compliance or certification differences between these parts?

A: The TQ2SL-4.5V provides documented ROHS3 compliance and REACH Unaffected status. Both parts are Active in product status and suitable for regulated applications.

Q: What switching loads can these relays handle?

A: Both parts support maximum switching loads of 2A at 125VAC or 220VDC. Contact material composition (Silver Nickel with Gold plating) ensures reliable switching performance across the specified voltage and current ranges.

Q: What is the coil power consumption for these relays?

A: Coil current is 31 mA at 4.5VDC nominal voltage, resulting in approximately 140 mW power consumption. Coil resistance is 145 Ohms.

Q: Are these relays suitable for low-voltage switching applications?

A: Yes. Must Operate Voltage is 3.38 VDC and Must Release Voltage is 0.45 VDC, enabling reliable operation in low-voltage control circuits. Operate and Release times are both 4 ms.

Q: What is the operating temperature range for these relays?

A: Both parts operate reliably across -40°C to 85°C, suitable for industrial, telecommunications, and automotive control applications.

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